Circular saw mill



(No Modl.) 2 snegts-sneet 1. W. P. CLARK. 011101114444 SAW MILL. No. 294,442.. v Patented Mar. 1884.

WITNESSES: I INVENTOR I I. BY f Z/W ATTORNEY;

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CIRCULAR SAW MILL.

(No Model.)

No. 294.442. Patented Mar. 4, 1884.

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ATTORNEY.

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- UNITED STATES PATENT OFF CE.

WILLIAM P. CLARK, OF BELMONT, NEW YORK.

CIRCULAR SAW MILL.

SPECIFICATION forming part of Letters Patent No. 294,442, dated March 4 1884.

Application filed November 26, 1883. (No model.)

in the peculiar combinations and construction and arrangement of parts hereinafter described, and thenpointed out in the claims.

In the accompanying drawings, Figure 1 shows a plan of a saw-mill constructed according to my improvement. Fig. 2 is a side viev of part of the gearing, showing the mode of changing the feed mechanism. Fig. 3 is an end view, and Fig. 4 is a side view, of the carriage, ways, 85c.

A is the saw-arbor, mounted in suitable I bearing, a, on the frame, and carrying the drive-pulley B, friction-pulley O, and the feed cone D. At I is the feed-shaft, working in bearings on the front end of the husk and carrying the balance-wheel H, smalhfriction-wheel F, and the feed-cone G, connected bya band (not shown) with the cone D, in. the usual manner.

J is an intermediate shaft, carrying on one end a gear-wheel K, which meshes with the larger gear-wheel L on the drum-shaft M. On the other end of theshaft J is a friction-pulley, E, placed in line with the pulleys O and F. The shaft J is hung in an eccent ig S (see Fig. 2,) which ise nnected byarms 8, rod S, arm S", and the shaft T to the sawy ers lever V. By the movement of this lever the eccentric will be-rolled in its bearing, and the shaft J thus movedbrings the friction-wheel E into contact with the friction-wheels G or F, according as it is desired to feed or gig the carriage. The shaft M, which works in bearings m in the mill-timbersW, carries a drum, N,

having-a spiral groove, around which passes the rope O, which alsopasses over adjustable sheaves P 1?, having their bearings in yokes Z, one of which is secured in asuitable guide, 1, near each end of the track, W, on which the carriage runs. The yokes Z, carrying the sheaves P, are fastened adj ustably in the guides I by means of screw-bolts Q, having nuts g at rope.

equivalent arrangement.

\ the ends of the guides I, mainly for the purpose of taking up the slack of the rope as it lengthens, and thus keep it taut. The rope O is attached to the carriage It by being passed through eyes in the connecting-arms a", and its ends are fastened one to each end of the drum. The rope is so wound on the drum that'it is full of rope at all times, and there is no danger of therope slipping. When motionis communicated to the mill and the lever V is moved toward the saw-arbor, the change in the position of the eccentric will bring the frictionwheel E into contact with the feed frictionwheel F and the shaft J will thus be revolved toward the sawyer, and the gear K, meshing with the gears L, will revolve the shafts M and drum N in the opposite direction, and move the carriage R toward the saw. The reverse movement of. the lever V will change the po sition of the eccentric, and thus bring the fric- 4 tion-wheel E in contact with the friction-wheel O, which will reverse the motion of the shaft J and gig the carriage.

It will be observed that the yokes Z, carrying the pulleys 1?, being secured only by the screw-bolts Q and nuts q, will swing sidewise to a certain extent and thus accommodate themselves to the varying positions of the rope as it winds on or unwinds off the drum. As the pulleys P are usually about sixty feet apart, or thirty feet from the drum, this swinging of the yokes is not actually necessary, if the groove in the. pulley is properly proportioned; but with the swinging of the yoke.

there is less necessity for deep grooves in the pulleys, and there will be less friction on the In some cases I propose to set the yokes Z one near each side of the track, instead of the center, as shown.

I have shown a rope, but it is evident that a belt or a chain may be substituted for, and 1 would be an equivalent for, the rope, and that instead ofthere being one rope, as shown, two ropes may be employed, one end of 'eachbeing connected to the carriage, which would producesubstantially the same effect as if but one rope were employed, and would be an By this arrangement and construction a rope-feed can be read ily operated at a fast speed without the independent engine which is usually required in running rope-feeds at their full speed.

Vithout the use of the gearing and friction wheels shown and the fiy-wheel 11 a very rapid gigging motion cannot be given to the car riage, because it cannot be arrested and reversed on account of the slipping of the friction and belts; but the tly-wheel H on the end of the feed-shaft acquires such momentum that it will stop and reverse the carriage under the highest gigging speed. I am thus enabled to run the carriage nearly or quite as fast as it is p actical to do with independent engines without the extra cost and trouble attending the use of such engines.

\Vhat I claim as new is 1. The combination, with a saw-mill carriage, of a revolving drum and a rope connected with the carriage and passing over pulleys at the opposite ends of the track, and having its ends connected with the drum, substantially as described,

2. The combination, with a saw-mill arriage and a rope connected therewith and passing over apnlley ateach end of the track, of a spirally-grooved revolving drum having the ends of the rope madet'ast at its opposite ends, substantially as described.

3. The combination, with a saw-mill carriage, of a rope connected therewith and passing over a swinging pulley at each end otthe track, and of a revolving drum having the o i posite ends of the rope connected thereto, subf stantially as described. I

4. The combination, with a saw-mill carriage, of the pulleys l, mounted in yohes, as I; Z, constructed to be adjusted lengthwise ot' the ways, the drum N, and the rope 0, connected to the drum and carriage and passing over the pulleys P, all substantially as shown and described.

5. In a rope and feed works of a saw- 0 mill, the ropeO, connected to the carriage and passing around pulleys l and drum N, said drum being connected with the saw-arbor by gearing, substz'intially as described, constructed to gi 'e the drum and rope different speeds in opposite directions, in combination with the tly-wheel H, arranged on the shaft I ofthe feeding-pulley, whereby the momentum of said ily-whccl prevents the slipping of the friction and belts, substantially as described.

(3. The combination, in a saw-mill, of the rope 0, connected to the log-carriage and running over the pulleys l and wound around the drum Ii, said drum being connected by its shatt hi and gearing K L with the i'rictionwheel E, mounted on the shaft J, carrying gear 1i, and adapted to be alternately thrown into contact with the friction-wheel C on the sawarbor, and with the friction-wheel F, running on the shaft 1, and the ily-wheel H, mounted on said shat't, substantially as and for the purpose specified.

In testimony whereof Iatlix my signature, in presence of two witnesses, this (5th day of November, 188i \VILLIAM P. CLARK.

\v'itnesses:

.T. 3'. Even, J. 1i. Bnn'sox. 

